Precoder estimation
Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment (UE) may receive, from a network node, an indication of a slot to be associated with precoder estimation, the indication of the slot including an indication of a first precoder and one or more parameters associated with the slot. The UE may receive, from the network node and during the slot, a first one or more reference signals associated with estimating a physical channel using the first precoder and a second one or more reference signals associated with estimating a second precoder using the estimated physical channel. The UE may receive, from the network node, one or more signals based on the second precoder. Numerous other aspects are described.
1. A user equipment (UE) for wireless communication, comprising:
a memory; and
one or more processors, coupled to the memory, configured to:
receive, from a network node, an indication of a slot to be associated with precoder estimation, the indication of the slot including an indication of a first precoder and one or more parameters associated with the slot;
receive, from the network node and during the slot, a first one or more reference signals associated with estimating a physical channel using the first precoder and a second one or more reference signals associated with estimating a second precoder using the estimated physical channel; and
receive, from the network node, one or more signals based on the second precoder.
2. The UE of claim 1 , wherein the one or more processors, to receive the indication of the slot, are configured to:
receive, during the slot, a control channel communication including the indication of the slot.
3. The UE of claim 1 , wherein the one or more processors, to receive the indication of the slot, are configured to:
receive a control channel communication or a medium access control communication that includes the indication of the slot.
4. The UE of claim 1 , wherein the indication of the first precoder includes an indication of a codebook identifier associated with the first precoder.
5. The UE of claim 1 , wherein the one or more parameters include at least one of:
an indication of a starting time of the slot,
an indication of a first starting symbol, within the slot, associated with estimating the physical channel,
an indication of a second starting symbol, within the slot, associated with estimating the second precoder, or
an indication of a third starting symbol, within the slot, associated with data communications.
6. The UE of claim 1 , wherein the slot is associated with a first one or more symbols associated with a control channel, a second one or more symbols associated with estimating the physical channel, and a third one or more symbols associated with estimating the second precoder.
7. The UE of claim 1 , wherein the one or more processors, to receive the one or more signals based on the second precoder, are configured to:
estimate, using the second precoder, values associated with one or more radio frequency impairments associated with the one or more signals.
8. The UE of claim 1 , wherein the one or more processors are further configured to:
receive, from the network node, an indication of another slot associated with precoder estimation or an indication to stop a use of the second precoder; and
refrain from using the second precoder for processing signals associated with the network node.
9. The UE of claim 1 , wherein the one or more processors are further configured to:
estimate, using the first precoder, the physical channel based on the first one or more reference signals, to obtain the estimated physical channel; and
estimate, using the estimated physical channel, the second precoder based on the second one or more reference signals.
10. A network node for wireless communication, comprising:
a memory; and
one or more processors, coupled to the memory, configured to:
transmit an indication, for a user equipment (UE), of a slot to be associated with precoder estimation, the indication of the slot including an indication of a first precoder and one or more parameters associated with the slot;
transmit, during the slot, a first one or more reference signals, using the first precoder, and a second one or more reference signals using a second precoder; and
transmit, using the second precoder, one or more signals for the UE.
11. The network node of claim 10 , wherein the one or more processors, to transmit the indication of the slot, are configured to:
transmit, during the slot, a control channel communication including the indication of the slot.
12. The network node of claim 10 , wherein the one or more processors, to transmit the indication of the slot, are configured to:
transmit a control channel communication or a medium access control communication that includes the indication of the slot.
13. The network node of claim 10 , wherein the indication of the first precoder includes an indication of a codebook identifier associated with the first precoder.
14. The network node of claim 10 , wherein the one or more parameters associated with the slot include an indication of a timing of the slot.
15. The network node of claim 10 , wherein the one or more processors are further configured to:
transmit an indication, for the UE, of another slot associated with precoder estimation or an indication to stop a use of the second precoder.
16. A method of wireless communication performed by a user equipment (UE), comprising:
receiving, from a network node, an indication of a slot to be associated with precoder estimation, the indication of the slot including an indication of a first precoder and one or more parameters associated with the slot;
receiving, from the network node and during the slot, a first one or more reference signals associated with estimating a physical channel using the first precoder and a second one or more reference signals associated with estimating a second precoder using the estimated physical channel; and
receiving, from the network node, one or more signals based on the second precoder.
17. The method of claim 16 , wherein receiving the indication of the slot comprises:
receiving, during the slot, a control channel communication including the indication of the slot.
18. The method of claim 16 , wherein receiving the indication of the slot comprises:
receiving a control channel communication or a medium access control communication that includes the indication of the slot.
19. The method of claim 16 , wherein the indication of the first precoder includes an indication of a codebook identifier associated with the first precoder.
20. The method of claim 16 , wherein the one or more parameters associated with the slot include an indication of a timing of the slot.
21. The method of claim 16 , wherein the one or more parameters include at least one of:
an indication of a starting time of the slot,
an indication of a first starting symbol, within the slot, associated with estimating the physical channel,
an indication of a second starting symbol, within the slot, associated with estimating the second precoder, or
an indication of a third starting symbol, within the slot, associated with data communications.
22. The method of claim 16 , wherein the slot is associated with a first one or more symbols associated with a control channel, a second one or more symbols associated with estimating the physical channel, and a third one or more symbols associated with estimating the second precoder.
23. The method of claim 16 , wherein receiving the one or more signals based on the second precoder comprises:
estimating, using the second precoder, values associated with one or more radio frequency impairments associated with the one or more signals.
24. The method of claim 16 , further comprising:
estimating, using the first precoder, the physical channel based on the first one or more reference signals, to obtain the estimated physical channel; and
estimating, using the estimated physical channel, the second precoder based on the second one or more reference signals.
25. A method of wireless communication performed by a network node, comprising:
transmitting an indication, for a user equipment (UE), of a slot to be associated with precoder estimation, the indication of the slot including an indication of a first precoder and one or more parameters associated with the slot;
transmitting, during the slot, a first one or more reference signals, using the first precoder, and a second one or more reference signals using a second precoder; and
transmitting, using the second precoder, one or more signals for the UE.
26. The method of claim 25 , wherein transmitting the indication of the slot comprises:
transmitting, during the slot, a control channel communication including the indication of the slot.
27. The method of claim 25 , wherein transmitting the indication of the slot comprises:
transmitting a control channel communication or a medium access control communication that includes the indication of the slot.
28. The method of claim 25 , wherein the indication of the first precoder includes an indication of a codebook identifier associated with the first precoder.
29. The method of claim 25 , wherein the one or more parameters associated with the slot include an indication of a timing of the slot.
30. The method of claim 25 , wherein the one or more parameters include at least one of:
an indication of a starting time of the slot,
an indication of a first starting symbol, within the slot, associated with estimating a physical channel,
an indication of a second starting symbol, within the slot, associated with estimating the second precoder, or
an indication of a third starting symbol, within the slot, associated with data communications.